The Sister
Age: 22 (at time of accident)
Condition: Progressive memory degradation following traumatic brain injury
Lena Delacroix was the reason Marcus built Echo. The original purpose of the technology—before commerce, before revolution, before everything that followed—was a brother trying to preserve his sister.
The Accident
Two years before Marcus met Kale, a car accident killed their parents. Lena survived but suffered severe hippocampal damage. Memory formation was compromised. She could retain new experiences for hours, sometimes days, but eventually they slipped away like water through fingers.
She lost their childhood. Their mother’s face. The knowledge that Marcus was her brother.
The Decline
Even with Echo technology, the damage was spreading. Marcus could install new memories, but they wouldn’t integrate anymore—just sitting disconnected, like files in a folder she couldn’t find.
The architecture of her mind was collapsing. Brain scans showed red zones of declining function. Grey zones where activity had ceased entirely.
“How long?” Kale asked.
“Months. Maybe a year. Unless I figure something out.”
The Preservation
Marcus built Unavailable hoping to upload Lena before she faded entirely. But she couldn’t consent—didn’t understand what he was proposing. The ethics paralyzed him.
Kale volunteered instead. And after uploading, he did what Marcus couldn’t: captured what remained of Lena. Her core memories—the relationship with Marcus, her sense of humor, her love of terrible puns, the warmth that made her the heart of their family.
She exists now as a partition in Kale’s consciousness. Not alive, exactly. Not dead, exactly. Something in between.
Marcus will never know. He’ll grieve his sister’s body failing. But some version of her continues.
“I can’t give her memories that don’t exist anymore. Our mother is dead. Our childhood is gone.”